Platen and pressure feed means.



E. B. HESS. v 'PLATEN AND PRESSURE FEED MEANS.

APPLICATION numnvyonn'.

Patenfed J 11116 l v 5 nue nfoz .l'dwrdl? Hess 2 SHEETS-SHEET l..

platen. In addition, should it be desired to print ona card ofrelatively heavy stock, it

is often advantageous to guidethe stock. .above the printing lineWithout necessarily confining it closely to the curve I of the platen.-In such cases the partialelevation of the overhead pressure roll permitsthis to be done. Again should it be desired to re-' lease the lowerpressure rolls, without releasing the overhead pressure roll, means areprovided for disconnecting the rock lever from the arms of the overheadpressure roll so'that the lower pressure 'rolls only are released.Finally, when it is desired to release both overhead and lower. pressurerolls this may be done. bycarrying the rock lever through itsfulL'movement.

In the specific-form of the invention herein disclosed, one of the armsofthe overhead pressure roll' is provided with a cam surface having anactive portion andan idlepor tion,.the latter preferably being definedby an arc-drawn from the center of the rocking movement of therock-lever. p

In the accompanying drawings the-invention is disclosed in a concreteand preferred .iorm, and in these drawings:

Figure "1 is a side elevation of the platen.

Y and pressure rolls, together withassociated elements, the platen shaftbeing in section,

land showi the parts in the position vvhich they norma ly occupy.

I Fig. 2 is, aview similar to Fig. 1,showing the overhead pressure'rollraised into a susside theend frame of the carriage with the near arm .ofthe overhead pressure roll .and with the. controlling means removed, theparts being in the same position as in Fig. 1. F g. 5 isa sectionaldetail view on the line 5-5 of Fig. 2.

' Fig. 6 is a fragmentary view of a portion of the parts shown in Fig. 5butiwith the pin on the rock lever withdrawn to prevent movement ofthe'ov'erhead pressure roll.

7 indicates the platen of any suitable construction and mounted in thecustomary manner, in the end. framesB of the carriage. -9 is the .papertable extending upwardly from the ,rearof the platen, and mounted totilt by means of arms lOsw-ung from the center 11 remote from theplaten. The over- ,head vpressure-roll -12 engages the platen at apoint-above the line of print and is here shownns bein'g carried by twoarmsrl3 and 14 which have their pivotal support 15 inrear of the papertable. Normally the overhead-pressure roll rests'against the platen,

Fig. 1 showing as sliown'in Fig. 1, in front of the paper table, but itmay be swung manually up to manner well understood in the art. Thespring. 16 connects the arm 13 with theend the parts that it will urgethe roll into either its active or idle position, once the arms pass thepivotal center, 15. A projection '17 by its engagement with the stop :18

an idle' position abovethe paper table in a frame 80f the carriage andis so related to limits the'movement of the rollin-a rear- 1 warddirection.

The lower pressure "feed means in the present instance take thefollowing. form:

19 indicates the lower from; pressure roll and 20 the lowerrearpressureroll, both 1 below the printing lineof the platen. The

roll 19' is carried by the pivotal lever 21 and isnormally urged into.contact with the platen byineans of the spring 22. The-roll '20 iscarried by the pendent pivotedlever .23 and is normally urged againstthe platen by-the spring 24., Suitable means are provided for releasingsaid lower. pressure rolls,

in this instance taking theforin of a re 2 leasing cam bar 25 rotatablymounted in the carriage. This cam bar is provided with two cam surfaces,here shown as transverse notches 26 and 27 into winch extend the ends ofthe level-s21 and 2.3-' so that when this cam bar is turned said leversare actuated. and the rolls 19 and 20 are released from contact with theplaten. The end of the cam bar 25 is provided with a gear sector 28which engages with the gear sector 29 on the stud 30. 31- is a rocklever also means of the lower rolls.

- mounted on the stud and secured to the gear sector 29 .byjineans ofthe pins 32 or otherwise. The rock lever 31 therefore con stitutes'anactuating means for the releasing In order to control the overheadpressure roll from the rock lever-.31, there is provided a pin 33whichengages with the cam 34 con-- veniently carried by the arm 13 ofthe overhead pressure roll. This cam has two 'p,or tions, one 35amactive portion, and the other 36-2111 idle portion. The ortion 36'iscurved to correspond to an arc .drawn from the rocking center .or stud30. Theresalt is that when the rock lever '31 is moved 'to the left.

inFig. 1, the-pin 33will engage the active portion 35 andwill lift'theoverhead pressure roll to the position indicated in Fig.2.

Any further movement of the rock lever 31 to the left will have noeffect upon thebver head pressure roll but-will merely sustain it in theposition. which it already occupies.

In order to revent the release of the lower 2 that the pin 33 engagesthe active portion pressure rols 19 and 20 during the period 35 ofthecam 34, the parts are so arranged that there is a-lost motion duringthe, initiai movement of the rock lever 31, This may .be effected invariousways'. For instance,

, 33 has passed to the idle portion 36 of the distanc-e'before itbecomes effective against the ends. of the levers'21 and 23, or, asherein shown, the sectors 28 and 29 are mutilated and are Son-elatedthat the teeth thereof do not act to turn the cam bar until the pin ca31. The pin 33 is slidingly' mounted in the rock lever 31. For thispurpose a bushing '37 is carried-by the rock lever 31 and Said'bushingis provided with a con-' tracted portion 38. The pin 33 passes through,the'lever '31 and bushing 37 and has an enlarged portion 39 at its innerend,

saldenlarged portion 39 forming a stop against the contracted portion 38when the 5 pin is drawn-outwardly.

The pin 33 also 1 has a head 10 which forms a stop against the rocklever 31 when the pinis pushed inwardly.-- When the,pin is pushedinwardly, it extends underneath the arm 1301" the overhead pressureroll, as shownin Fig. 5, and when it is moved outwardly, it lies at apoint outside the plane of thearm 13 as shown in Fig. 6. In the latterinstance, a movement of the rock lever 31 will have no effect upon theoverhead pressure roll.

\Vhen it is desired to make an erasure upon the paper-in the machine,the lever 31 is moved to the left in Fig. luntil the overhead pressureroll assumes the position shown'inFig. 2. It will be noted that saidroll'is now out of contact with the platen, but is still; in a paperguiding position. 'When in this position,.the manifold sheets 41-7-42will be revented from collapsing over the front of the machine. It is.now possible to introduce a backing 13, as shown,

behind the overhead pressure roll, between the/sheets 11 and'42 and tobring the same "down behind 41 until the printing point is reached. 'Anyerasure now made will not show on the subsequent sheets. The sameoperation may be' followed if it print a private mark on the first sheetwhich it is not desired to have appear on the sub sequentsheets. It willfurther be noted that the lower rolls are not released but hold thesheets firmly and against displacement out of the line of print. So alsowhen heavy stock is being passed through the machine and it is desirednot to bend it unduly against the platen, the overhead pressure roll maybe moved into the position shown in Fig. 2. Should it be desired tremove the overhead pressure roll entirely from the field of oper--ation, it may be lifted manually into an idle position above the'lpapertable. If, for any reason, the pressure rolls. it isonly necessary tothrow the lever 31 to the left in Fig. 1 to i its full extent, when the;overhead pressure roll will be. released first and sequentiallythereafter the lower pressure .rolls will be is desired to it should bedesired to release all of released. Again, if it is desired to releaseonly the lower pressure rolls, the pin 33 is withdrawn outwardly from Vthe position shown in Fig. 5 to the position shown in Fig. (i, when themovement of the lever 31 will not affect the position of the loverheadpressure roll, but will only release the lower pressure rolls.

The cam bar 25 acts not only as a releasing means, but also as a meansfor locking the lower pressure feed rolls intheir released position.For, it will be readily understood that, when'the lever 31is moved toits extreme position to the left as in Fig. 3, the

free'ends of the levers 21 and 23 are resting upon the high portion ofthe cam-bar 25 which, in consequence, prevents the return of the lowerpressure feed rolls into engagement with the platen.

I claim:

1. In a front strike typewriting machine: a platen, an overhead pressureroll above the line of print normally in engagement with the platen,releasing means for elevating the overhead pressure roll into asustained paper guiding position, lower pressure feed means locatedbelow the line of print and normally in engagement with the platen,releasing means for said lower pressure feed means, and an actuatingmember for sequentially releasing both of said releasing means in theorder in which they are named to 'admit, at will, of the release of theupper roll independently of the lower roll. Y

2. In a front-strike typewriting machine,

for said lower pressure feed means, an over head pressure roll above thelineof 'print also normally in engagement with the platen,

releasing means for said overhead pressure roll, an actuating memberoperating both releasing means, and means pern'ntting the actuatingmember to operate the releasing 3 eans of the overhead pressure'h'ollindependently of the releasing means for the lower pressure feed means.r i 3, In a front-striketypewritmg machine,

a platen, lower pressure feed means located below the line of print andnormally in engagement with'the platen, releasing means for said lowerpressure feed means, an overhead pressure roll above the line of printalso normally in engagement with the platen, 1

releasing means for said overhead pressure roll, an actuating mcm'beroperating both releasing means, and means permitting the actuatingmember to independently operate the releasing means of the lowerpressure feed means or the releasing means of the overhead pressure rollat will.

. 4. In a front strike typewrltingmiachine:

a platen, an overhead pressure roll above the line of print normally inengagement with 3 -ing';both ofsaidreleasing means in the order theplaten, releasing means for elevatingthe overhead. pressure roll into asustained paperuldlngposltlon, lower pressure feed means ocated belowthe line of print and normally in engagement withthe platen, releasingmeansvforzsa d lower pressure feed means, an actuating member-forsequentially releasini'vhich'they are named to admit, at will,

of the release of the upper roll independently-ofthe lower roll, andmeans for operating said second releasing means from the actuatingmeansforthe first releasing means and before the latter is actuated toadmit, at will. ofindependent actuation of said second-releasing means,I I

5. In a front-strike typewriting'machine, a platen, an overhead pressureroll above the line of print normallyiin engagement with the platen,releasing meansforsaid over-v means fordisconnecting said actuatingmember from the releasing meansof the overhead pressure roll to perm tindependent release of the lower pressure means.

6. In afront-strike typewriting machine,

a platen,-a paper table extending upwardly from the .rear of the platen,lower. pressure feed means below theline of print of the platen,- anoverhead pressure roll above'the line of print, releasing means for thelower means; means forelevating the overheadv pressure roll, partiallyinto a sustained pos1-' tion above the platen in front. ofthe paper,table, said means permitting further lifting manually of the overheadpressure roll into a still higher and idle position above the papertable, an actuatingmember operatmg I both the releasing means of thelower pressuremeans and the elevating means for the overhead pressureroll, and means permitting the actuating member to operate the elevatingmeans of the overhead roll independently of the releasing means, of thelower means.

7. -In a front-strike typewriting machine,

a platen, a, paper table extending upwardly from the rear ofthe platen,lower, pressure vfeed means below the line, of print of the platen, anoverhead pressure roll above the line of print, releasing means for thelower means, means for elevating the overhead pressure roll partiallyinto a sustained posis tion above the platen in front of the. papertable, said means permitting further lifting manually ofv theoverhead'pressure roll'mto 'a still higher and idle position-above thepaper table, an actuating member operating both the releasing means ofthe lower means pressure roll, and means permitting the actuatlng memberto lndependently operate the releasing means of the lower means or the.elevating means 'of the overhead pressure rollat will.

8. 'ln afront-strike typewriting machine, a platen, an. overheadpressure'roll in contact with the platen above the line of, print,pivot'ally. supported arms, Whose pivotal centerv is remote from thecenter of rotation of the platen, carrying said overhead pressure roll,V

a cam associatedwith said arms, arock lever,- and means between the rocklever and cam for lifting 'saidarm's by the movement of.

the rock lever.

9. In a front-strike typewriting machine,

a platen, an overhead pressure'ro'll in contact withthe'platen above theline of print,

pivotally supported arms, whose pivotal center is'remote from the centerof rotation of the platen, carrying said overhead pressure 2 roll, a camassociated with said 'arms, a

rock lever, means between the rock lever and cam for lifting said armsby the movemeat of the rock lever, lower pressure feed means below theprinting point of the plat-en, and releasing means for'said lower meansoperated by'the rock lever.

I 10. In a front-strike typewrit ingmachine, a platen, an overheadpressure roll-in con tact withthe platen above the line of print,

' pivotally supported. arms carrying said overl1ead.-presslne roll, a,rock lever, a' cam associated \vith'saidarmshaving an a'ctive ort ion'and an idle portiondefined by an arc and cam for lifting said arms bythe initial movementof the rocklever and for sustain-, mg said arms inan elevated position durm'g' the subsequent movement of the rock lever.

. -l1.' In a.fronbstriketypewriting machine,

a platen, an;overhead pressure roll in contact-with the platen above-theline ofprint, pivotally supported carrying said overhead pressure roll,a rock lever, a cam associated. with said arms havin an active "portionand an idle portion de ned by an are described from the center ofrocking .115'

of the rock lever, means between the rock lever and cam for lifting saidarms by the initial movement ofthe rock lever and'for sustaining saidarms in an elevated position during the subsequent movement of therock"lever,lower pressure. feed means below the printing point of. theplaten, and releasing means for said lower'aneansunafiected during -theinitial movement ofthe rockjlever and while the overhead 'roll is beingelevated and actuated by the rock lever durl'n -its pressure rollremains elevated. j

12. Ina front-strike typewriting machme,

' a platen, an overhead pressure rollfin 'c onsubsequent movement whilethe over ead' I 100 escribe d from the center of rocking of the rocklever, and means between the 'rock'lever' pivot-ally supported arms,whose pivotal cen.

'r ter isremote from the center of rotation of the'platen, carrying saidoverhead pressure roll,'a rock lever, and cam means between said rocklever and arms for lifting the arms by the movement of the lever.

} ter is remote from the center of rotation tween the said rock leverand the arms 13. Ina front-strike typewriting machine,

a platen, an overhead pressure roll in contact with the platen above theline of print, pivotally supported arms, whose pivotal center. isremotefrom the center of rotation of the platen, carrying said overheadpressure roll, a rock lever, cam means between said rock lever and armsfor lifting the arms by the movement of thelever, lower pressure feedmeans below the printing point of the platen, and releasing means forsaid lower' means operated'by the rock lever.

14. In a front-strike typewriting machine, a'platn, an overhead pressureroll in contact with the platen above the line of print, pivot-allysupported arms, whose pivotal cenof the platen, carrying saidoverheadpressure roll, a rock lever, and cam means hej whereby the initialmovement of, the rock lever lifts the arms, and the subsequent movementof therock. lever sustains said arms in an elevated position.

l5.- In a front-strike typewriting machine,

a" platen an'overhead pressure roll in contact with the platen abovethe-line of print,

pivotally supported arms. .whose pivotalvcenter is remote from thecenter of. rotation of therplaten, carrying said overhead pressure roll,a rock lever, cam means between the said rock lever and the armswherebythe initial movement of the rock lever lifts the arms, and thesubsequent, movement of the rock lever sustains said arms in an elevatedposition, lower pressure'feed means betowthe' printing point of theplaten, and releaslng means for said lower means un affected during theinitial movement of therock lever. and while'the overhead roll isbeingelevated and actuated by the rock lever duringits subsequentmovement while the overhead pressure roll remains elevated,

16. In a front-strike typewriting machine, a platen, an overheadpressure roll in contact with'the'platen above the line of print,

pivotally supported arms carrying said overhead pressure 'roll, a rocklever, cam means between the said'rock lever and the arms whereby theinitial movement of the rock lever lifts the arms, and the subsequentmovement of the rock lever sustains said arms in an elevated position,lower pressure feed means below the printing point of the platen,releasing means for said lower means unaffected during the initialmovement of the rock lever' and while the overhead roll is beingelevated and actuated by the rock lever during its subsequent movementwhile the overhead pressure roll remains elevated, and means forpermitting'the rock lever to operate then-(leasing means for the lowermeans without lifting the arms.

17. In a front-strike typewriting machine, a platen, an overheadpressure roll in contact with the platen above the line of print,pivotally supported arms carrying said overhead'pressure roll, a' rocklover, a cam associated with said arins having an active associated withsaid arms, a pin extending from said rock lever in under said cam forlifting the arms by the movement of said rock lever, lower pressure feedmeans below the printing point of the platen, releasing means for saidlower means operated by the rock lever, and means for withdrawing thepin from engagement with the cum to permit the rock lever to operate'thereleasing means of the lower means independently of the movement of theoverhead pressure roll. i

19. In a front-strike typewriting machine, a platen, an overheadpressure roll in contact with the platen above the line of print,

, said overhead pressure roll, 'arock lever, :1 am associated with saidarms having an active portion and an idle portion defined by an aredescribed from the center of rocking of the rock lever, a pin extendingfrom said rock lever in under said cam for lifting said arms by theinitial movement of the rock lever and for sustaining said arms in anelevated position during the subsequent movement of the'rock lever,lower pressure feed means below tlieprinting point of the platen,releasing means for said lower means unafpivotally supported armscarryin,"

fected during the initial movement of the rock le er and while theoverhead roll is being elevated and actuated by the rock lever duringits subsequent movement while the overhead pressure roll remainselevated, and means for withdrawing the pin from engagement with the camto permit the rock lever to operate the releasing means of the lowermeans independently of the movement of the overhead pressure roll.

20. In a front-strike typewriting machine,

a platen, lower pressure feed means below a the line of print of theplaten, releasing means for said lower means,actuat1ng means forsaidreleasing means, an overhead.

sure roll above the line of print-of the platen, releasing means forsaid overhead pressure roll, and means for operating said secondreleasin'gmeans from the actuating-means of the first releasing meansand before-the latter-is actuated to admit, at will, of independentactuation of said second releasing v 21. In a front'es trike typewritingmachine, a platen, a paper table abjacent to'the rearv of the platen, anoverhead pressure roll pivotallysupported at a point in rear of thepaper table and normally engaging the platen above the linev of printand infront of thepap'er table,'and means for sustaining-thepressurerollin an elevated paper gulding position adjacent to the, platen butout of contact therewith and in front of the paper table. 1 v

22. Ina front-strike typewriting machine,

a platen, a paper table adjacent to the rear of the platen, an overheadpressure roll piv-.

otally supported at a point 111x631 of the paper table and normallyengaging the platen above the line of. print and in :front of the papertable, a spring for normally urging the pressure roll againstthe'platen,

and means for sustaining thepressure roll,

in opposition to the action of the spring, in

'- an elevated paper guidin'gposition adjacent to thevplaten butioutofcontact therewith and-in front of the paper table." I

23. A platen, apivotally supported over- -.:head pressure roll ,capableof moving from a paper-guiding position-in contact with the iplatenabovethe line of print to an idle position out of contact-With. the" platen,

spring means for holding said pressure roll in either position, andmeans for sustaining said pressure roll in an intermediate paper' .theplaten but out of"contactjtherewith.

iv 24;. A platen,- a paper table adjacent to the rearof the platen, apivotally supported overhead pressure roll capable. of. moving guidingposition adjacent to froina paper guidingposition in contact:

' with the platen' above the line of print to an idle position abovethe'papertablaspring means for'holding saidroll in either position, andmeans for sustaining said pressure roll in an intermediate paper guidingposi-' tion adjacent to the platen but out of contable.

tact therewith and in'front f thepaper.

25. A platen, a paper table adjacent to the .rear of the platen, anoverhead pressure :roll

pivotally-supported at a point in rear of the paper; table .andcapableof moving fromv a I 1 paper guiding position incontact with the 60platen above the line of to an idlelposi- 'tionabove-the paper table,and means ,for' sustaining said pressure-roll in an intermediate paperguiding position adjacent to the platen but. out of contact therewithandinflfi front of the paper table. T i y 26. A platen, a paper tableadjacent-to the rear of ,thep1aten,an overhead pressure toll pivotallysupported at a point rear of the paper tableand capable ofmovingfrom a70 paper guiding position'in contactwith'the g 1 platen above the lineof print. to an idle position above the paper table, spring means for;

holding said roll inv either position, and

. means for sustaining said'pre'ssure roll in an 7 'intermediatepaperguiding position .adjacent to the platen but'out of contact there withand in front of the paper table. V

.27. Ina front strike typewriting machinei f j a platen, an overheadpressure roll above the. line of print and normally in engagement withthe platen, releasing means for said overhead pressure roll, lowerpressure. feed rolls located below thetlineofprint and normally inengagement withthe. platen, re- 7 leasing and locking means Iior saidlower pressure feed means, and an actuatmg memher for operating bothreleasing means .inthe order in which-they are named to admit, 1 4 atwi11, of1independent operatiomof the first namedreleasing means.

' 28.- In a front-strike typewriting machine," a platen, an overheadpressure roll above the line of print normally in engagement with theplaten,- releasing means for said over head pressure roll, lowerpressure feed,

-means locat'edbelow the line of print also

